I can not change the value I want from a file through a ShellScript

Question

I can not change the value I want from a file through a ShellScript

Navigation

#1 by (0 votes)
#2 by (0 votes)

0

88020:Maria Aguiar:EIB2:914256321:[email protected]:carro:Mercedes:1414-TX-13:13:14:4
83605:Tiago Domingues:ETA4:934442913:[email protected]:carro:BMW:14-TD-16:1:130:200

I have this code in a file, named condutores.txt . And in the script I wanted to change the ninth column by a value that I intend for example.

And I've tried this:

Numero9=$(cat condutores.txt | awk -F ':' '{print $9}' | tail -n +$1 | head -1)

NovoNumero9=$(( $Numero9+ 1 ))

sed -i 's/'"$Numero9"'/'"$NovoNumero9"'/' condutores.txt

But it changes me all the places along the line where $Numero9 occurs and I wanted it to change only in the ninth column, the columns being divided by ":" .

shell-script

asked by anonymous 03.11.2018 / 16:39

2 answers

0

You can use

awk -F: -v OFS=':' '$9 == "13" { $9 = "888" }1'  arquivo

If you want to write to a new file, use > newfile at the end of the command

14.11.2018 / 16:21

Change text color on ionic How to receive the store passed by the mobx-react Provider?

score 0 · Accepted Answer

I would advise you to do this line by line, as follows:

# verifica o número de linhas que o arquivo tem
linhas=$(wc -l file | awk '{print $1}')
# pega o conteúdo do arquivo e coloca na variável
file=$(cat file)
# faz um laço for para subistituir linha a linha
for (( i = 1; i <= $linhas; i++ )); do
    # pega o conteúdo da linha em questão
    linha=$(sed -n $i'p' <<<"$file")
    # pega o valor da coluna em questão, da linha $i
    value=$(awk -F: '{print $9}' <<<$linha)
    # novo falor para ser substituído
    n_value=$[value + 1]
    # faz a substituição dos valores
    n_linha=${linha/:$value:/:$n_value:}
    # faz a substituição da linha no arquivo, com os novos valores
    file=${file/$linha/$n_linha}
    # escreve no arquivo
    echo "$file" > file
done

This script overwrites the original file, for testing it is advisable to create a new file by changing the last line of for

echo "$file" > file